Malicious PDF — malware analysis report

Static analysis result for SHA-256 8411862b78838d02…

MALICIOUS

PDF

50.9 KB Created: 2020-11-07 07:12:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: dc6831c43bc4c2e2d86353995d7da8f8 SHA-1: e864e9b13fba619232957e846b6f2a9bd906794a SHA-256: 8411862b78838d02f530e80ca784c817a9978d9ca9569e88334425e32ed65bc6
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafficel.ru/123?keyword=nbme+psych+form+4+answers PDF link annotation
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/8c42e885bf419f7.pdfIn PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/f4455c7c2dea9a2.pdfIn PDF document text
    • https://dizakevusarebiz.weebly.com/uploads/1/3/4/5/134581037/sifujukitesudiwovara.pdfIn PDF document text
    • https://kifisiwa.weebly.com/uploads/1/3/4/2/134266158/471357.pdfIn PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/pasex.pdfIn PDF document text
    • https://jixobufasov.weebly.com/uploads/1/3/4/3/134324480/8881636.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/7272502.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://pifakimep.files.wordpress.com/2020/11/fododuxuxinoni.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/tufemeridetapuwamoxube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e003e4b-26d4-4bad-94c9-e0173f0221b7/zodawugixitaluj.pdfIn PDF document text
    • https://wefaresif.files.wordpress.com/2020/11/95021015300.pdfIn PDF document text
    • https://jazimosisek.files.wordpress.com/2020/11/textbook_of_general_surgical_oncology.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/martin_custom_d_14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ae05b1c-aa70-46a2-934f-0d9fc48d8e1f/ver_crepusculo_online_espaol_l.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7868 5276 bytes
SHA-256: 502a1a3fc7901968bd6e950183a701d06f42d9fe96b1427e8b1465c2dfc91eb8
font_01_sfnt_off00008a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3E 11396 bytes
SHA-256: 23a40195f060071f9147b249a557e7233cffc236ede87445bcad67342ecd8e2e
font_02_sfnt_off0000b0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.